Cisco WebEx Meetings Server up to 2.8MR2/3.0MR2 Castor XML xml external entity reference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco WebEx Meetings Server up to 2.8MR2/3.0MR2. It has been declared as critical. This issue affects some unknown processing of the component Castor XML. The manipulation results in xml external entity reference. This vulnerability is reported as CVE-2018-18895. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Cisco WebEx Meetings Server up to 2.8MR2/3.0MR2 (Unified Communication Software). Affected is some unknown processing of the component Castor XML. The manipulation with an unknown input leads to a xml external entity reference vulnerability. CWE is classifying the issue as CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A version of Castor XML, as used in Cisco WebEx Meetings Server before 2.8MR3 and 3.x before 3.0MR2 patch 1 and other products, allows XXE attacks.

The bug was discovered 11/02/2018. The weakness was disclosed 01/30/2019 as not defined mailinglist post (Bugtraq). The advisory is shared for download at seclists.org. This vulnerability is traded as CVE-2018-18895 since 11/01/2018. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 89 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 2.8MR3 or 3.0MR2 Patch 1 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: WebEx Meetings Server 2.8MR3/3.0MR2 Patch 1

Timelineinfo

11/01/2018 🔍
11/02/2018 +1 days 🔍
01/30/2019 +89 days 🔍
01/30/2019 +0 days 🔍
01/31/2019 +1 days 🔍
07/04/2023 +1615 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: 150162
Status: Not defined

CVE: CVE-2018-18895 (🔍)
GCVE (CVE): GCVE-0-2018-18895
GCVE (VulDB): GCVE-100-130332
SecurityTracker: 1042085

Entryinfo

Created: 01/31/2019 13:03
Updated: 07/04/2023 08:31
Changes: 01/31/2019 13:03 (45), 05/06/2020 20:03 (1), 07/04/2023 08:31 (3)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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